Title :
Audio coding using sinusoidal excitation representation
Author :
Chang, Wen-Whei ; Wang, De-Yu ; Wang, Li-Wei
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
Most LPC-based audio coders employ simplistic noise-shaping operations to perform psychoacoustic control of quantization noise. In this paper, we report on new approaches to exploiting perceptual masking in the design of adaptive quantization of LPC excitation parameters. Due to its localized spectral sensitivity, sinusoidal excitation representation is preferred to spectrally flat signals for use in excitation modeling. Simulation results indicate that the proposed multisinusoid excited coder can deliver high quality audio reproduction at the rate of 72 kb/s
Keywords :
audio coding; linear predictive coding; quantisation (signal); signal representation; spectral analysis; 72 kbit/s; LPC excitation parameters; adaptive quantization; audio coding; high quality audio reproduction; localized spectral sensitivity; multisinusoid excited coder; perceptual masking; quantization noise; simulation results; sinusoidal excitation representation; Audio coding; Bit rate; Filters; Frequency; Linear predictive coding; Noise shaping; Psychoacoustic models; Psychology; Quantization; Signal processing;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.599635
